- Fixes some problems with extending and maintaining connectivity with extended networks
- Fixes an issue with clients that enable 802.11 "Power Save"
- Fixes connectivity issues with some third-party devices
- Fixes an issue when the base station is configured for PPPoE
- Fixes some Back To My Mac issues with connectivity and support for third-party routers

The Time Capsule and AirPort Base Station Firmware Update 7.4.2 requires Mac OS X 10.4 or later. It is also recommended that AirPort Utility 5.4.2 or later be installed before upgrading to Firmware version 7.4.2.